Take-up for sewing-machines.



PATENTED APR. 30, 1907.

- J. DIBHL.

TAKE-UP FOR SEWING MACHINES.

APPLICATION FILE D MAY 8, 1897.

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No. 851,734. PATENTED APR. 30, 1907. J. DIEHL. TAKE-UP FOR SEWINGMACHINES.

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UNITED STATES P TENr orroE.

JACOB DIEHL, or CLEVELAND, CHI AssICNoN 'ro THE STANDARD SEWING MACHINECOMPANY, or CLEVELAND, 01-110, A CORPORATION oE OHIO.

TAKE-UP FOR SEWING-MACHINES.

Specification of Letters Patent.

Patented. April 30, 1907.

Application filed May 8, 1897. Serial No. 635,639.

To rtZZ whom, it may concern:

Be it known that 1, JACOB DIEHL, a citizen of the United States, and aresident of Cleveland, Cuyahoga county, State of Ohio, have invented newand useful Improvements in Take-Ups for Sewing-Machines, of which thefollowing description, taken in connection with the drawings herewithaccompanying, is a specification.

This invention relates to sewing machines, and more particularly to thetake-up and thread controlling devices embodied in such machines.

The principal object of the invention is to improve such devices so asto render both of the same positive in their action; thereby insuringtheir proper and regular operation in sewing at a high rate of speed,and further, to regulate their time and direction of movement relativeto each other and to the looper and needle, whereby the strain andfrictional wear upon the thread, caused by the action of such partsthereon, will be reduced to a minimum. This object I secure by means ofthe construction and combination of parts embodying my invention ashereinafter set forth in detail and pointed out in the claims.

Referring to the drawings: Figure 1, represents a side elevation of thefront end of a sewing machine embodying my invention, part of the armbeing broken away to show the parts supported therein. Fig. 2, is afront end elevation of the machine. Figs. 3, 4, 5, and 6, are frontelevations of the machine with the face-plate removed and the castingpartly in section, showing the relative positions of the take-up,thread-controller, needle, and looper, with certain of the operatingparts, at different times during the operation of the same, and Fig. 7,illustrates perspective views of certain of the parts of be hereinafterreferred to.

To explain in detail: a represents the bedplate of the machine, a theoverhanging c rm thereof, a, and a the needle and presser barsrespectively, b the rotating driving shaft suported in suitable bearingsin the arm a, and h the crank secured on the front end of said shaft andhaving operative connection with the needle-bar to operate the same,through the medium of a connecting pitman 6 The above parts, asdescribed, are of usual construction.

According to my present invention, 1 have ated to slide upon theneedle-bar independently thereof to give its thread-engaging arm 0 avertically reciprocating movement in proper time to give down and drawup the thread at each stitch, from the said crank b through the mediumof a connecting link I), which latter is pivotally connected at one withthe said sleeve 0 and at its opposite end with a rigidly connected armI) of the crank I). Said arm 6*, in the present instance and as moreclearly shown in Fig. 7, is connected with the crank so as to be movabletherewith, by means of a squared end I) on the crankpin which is enteredinto a like-shaped opening b in the arm I), but any other suitable formof connection may be employed between the parts or the same be formedintegral with each other, without departure from my invention.

The pitman connects at its lower end with a pin (Z which is secured upona collar or block d having a fixed connection with the needle-bar. Saidblock (1, in the present instance, is formed with a lateral extension (Zarranged with its end projecting into a vertically arranged groove (1located in the inner Wall of the arm a, in which it travels when theneedle-bar is operated so as to prevent the latter from turning in itsbearings. The said extension (I of the block (1 also serves, accordingto my present invention, as a means to support the pitman connecting pind in a position at one side of the center of the needle-bar as shown, inlieu of in a position central therewith as heretofore. The pin a beingthus supported at one side of, or eccen'trically to, the needle-bar,changes the time of movement of the needle bar relative to the looper sothat the dill'erential movement of the latter is greatly lessened; thusadapting the machine to be run at a higher rate of speed with greaterease and with less jar and strain upon the operating parts. The changein time of movement to the needlebar thus secured also better adapts thesame for its co-operation with the take-up and thread'controller as willbe hereinafter described.

The pin d with which the pitman connects, as herein illustrated, has alaterally adjustable connection with the block d in a direction towardand away from the needle-bar,

whereby it may be adjusted to regulate the action of the latter relativeto the looper and to a threadcontroller to be hereinafter referred to,by means of a longitudinal slot (Z in the extension of said block inwhich the pin may be moved, and in which it is adapted to 'be secured ina stationary adjustable position by means of a fastening screw (1 Anyother suitable construction may however be employed to secure suchadjustment of the pin, or the latter may be cast integral with .theblock, without departure from the invention.

In the operation of the take-up, after it has drawn up the needle threadloop to complete the stitch, it then begins to descend to give down therequired thread for the formation of the next stitch, and during suchdownward movement of the take-up and before the needle has entered thework, a certain amount of slack thread is produced whichis necessary tobe controlled or kepttaut until after the needlehas entered the work.Heretofore, thread controllers in the form of light springs have beenemployed for controlling such slack thread, but these, not beingpositive, have been found ineflicient when the machine is run at highrates of speed. To avoid such objection, I have provided a positivelyacting controller for co-operating with the take-up in handling theslack thread.

According to my invention and as a simple and convenient embodiment ofthe same, I have provided a vertically arranged lever e which ispivotally supported at its upper end on a lug e on the inner wall of thearm a, and rovided at its lower end with an outwar y turned extension 6which latter forms the controller proper and projects outwardly throughan elongated slot e in the face-plate as shown in Figs. 1 and 2. Suchextension at a point outside of the face-plate is provided with an eye 6therein through which the thread is adapted to be passed.

The controller lever, e is operated to give its lower thread engagingend 6 a vibrating movement in a direction substantially at right anglesto the path of movement of the vertically reciprocating takeup, and toand from a position in the line of draft of the thread between thetake-up and needle, so as to control the slack thread in a manner aswill hereinafter be described, as follows: The needle-bar operatingpitman b is provided with a fixed arm 6 having a pin or screw 6 at itsouter end which extends and operates within a cam slot e" formed in thesaid controller lever e. The said arm 0 of the pitman W, as hereinshown, projects from the latter at a point adjacent to its connectionwith the pin (1, whereby the operating end of such arm will be vibratedby the pitman in a direction as though pivoted upon said pin (Z,

movement to the controller lever e. The particular location however ofthe arm 6 upon the pitman 6 may be more or less changed, or othersuitable means for securing operative connect-ion between the pitman andthe controller lever be employed, without departure-from my invention'The operation of the machine embodying the construction as above setforth, is as follows: In threading the machine, the thread is passedfrom the spool or other thread supply throiwh suitable guides f, f, onthe faceplate of the machine, to the tension device f, and from thelatter through a guidef located in the line of draft of the thread inpassing between the take-up and the needle, and from thence up throughthe eye e in the controller to the take-up, and from the latter downagain through the controller and the guide f to the needle, all asclearly shown in Fig. 2. After the machine has been thus properlythreaded and the take-up-is in a position at the limit of its upwardstroke, as shown in Figs. 1, 2, and 3, the controller e is in a positionin the line of draft of the thread between the said take-up and theneedle as shown. Now, starting the machine with the parts in suchposition, the take-up and needle begin to descend and simultaneouslytherewith the controller begins to move toward the right in proper timeto control the slack thread given down by the take-up. The controllercontinues to move in such directionto keep the thread substantiallytautuntil the take-up and needle have reached their lowest point and thepoint it of the looper h is about to enter the thread thrown out by theneedle, as shown in Fig. 4. At this time, as the said looper enters thethread loop and begins to draw down upon the same, the controller alsobegins its return move ment from its outward limit of movement as shownin Fig. 4, in proper time to supply the thread to the looper asindicated by the relative movements of the same as shown in Figs. 5 and6. During such time as the looper is taking down the thread loop to aposition to be cast off, and the controller is being returned to itsnormal starting position to give down the slack thread controlledthereby to the looper, as shown in Fi s. 5 and 6, the take-up remainssubstantiafiy stationary as shown. This timing of the take-up issecured, in the present instance illustrated, by reason of the point ofpivotal connection between the take-up sleeve 0 and the connecting link6 being brought to a position almost coincident with the axis of thecrank 12 upon and communicate such positive vibrating ICC the downwardmovement of the take-up, whereby, during the movement of the crank fromthe position shown in Fig. 4 to that in Fig. 6 in operating thecontroller, the crank 1) moves the outer end of the link or pitman 5without causing the same to communicate but slight movement to the takeup as shown.

After the parts have assumed the position shown in Fig. 6, a continuedaction of the machine causes the controller to be moved into a positionin the line of draft of the thread between the take-up and needle; thelooper to cast off the thread loop; and the take-up to move upward toits original position, as shown in Figs. 1, 2, and 3, to draw up thethread loop into the work and complete the stitch. The take-up beingsupported upon the needle-bar as described, is guided thereon to move ina straight vertical line whereby it will have a direct pull upon thethread in drawing up the stitch; and the controller acting upon thethread only when it is placed in a slack condition at the downwardmovement of the take-up, and giving it to the looper in a substantiallyslack condition as required thereby, and then returning to its normalposition in the line of draft of the thread so as not to engage orinterfere with the latter when being drawn up by the take-up, all tendto secure the proper handling and controlling of the thread when themachine is run at high rates of speed, without undue wear or strainthereon, the advantage of which will be obvious.

Having thus illustrated and described one practical embodiment of myinvention, it will be obvious that the construction and arrangement ofthe several parts may be more or less materially modified, or the takeupand controller be applied 'to a reciprocating shuttle or other machinedifferent from the rotary shuttle machine herein shown,

Without departing from the spirit of my in- I vention.

WVhat I claim as new and desire to secure by Letters Patent of theUnited States is, 1. In a sewing machine, the combination,

with the needle-bar, of a reciprocating takeup having a movementindependent of that of the needle-bar, means guiding said takeup in apath substantially parallel with the path of the needle-bar, a vibratingthreadcontroller movable in a direction substantially at right angles tothe movement of the take-up and to and from a position in the line ofdraft of the thread between the take-up and needle, and meansindependent of the needle-bar for operating said controller positively.

2. In a sewing machine, the combination, with the needle-bar, of avertically reciproeating take-up having a movement independent of thatof the needle-bar and being supported and guided thereon, a pivotedvibrating thread-controller movable in a direction substantially atright angles to the movement of the take-up, and means independent ofthe needle-bar for operating the said takeup and controller.

3. In a sewing machine, the combination, with the needle-bar, of arotating shaft having a crank, and a take-up and a thread-controllereach having an operative connection with said crank and being actuatedthereby independent of the needle-bar.

4. In a sewing machine, the combination, with the needle-bar, of arotating shaft having a crank, and a take-up and a thread-eontrollereach having an operative connection with said crank through the mediumof a pitman and being positively actuated thereby independent of theneedle-bar.

5. In a sewing machine, the combination, with the needle-bar, and areciprocating take-up mounted to slide and operate thereon, of arotating shaft having a crank, the latter being provided with a fixedangular arm or extension having an operative connection with thetake-up, for the purpose set forth.

JACOB DIEHL.

WVitnesses Guns. 0. EMMONS W. O. TALMAGE.

